@misc{indiciaeebf081c30674,
  title = {Groups Containing Four and Only Four Non-Invariant Subgroups.},
  author = {G A Miller},
  year = {1943},
  doi = {10.1073/pnas.29.7.213},
  url = {https://pubmed.ncbi.nlm.nih.gov/16578077/},
  note = {Source identifier: 16578077}
}